Do you have a toxic best friend? Have you ever had a toxic friend in your life? Toxic friendships are hard to escape, especially if you two have been through a lot together. Oftentimes, toxic friendships don’t start out that way; they start out happy, fun, and exciting, but turn dysfunctional over time. So, how do you know if your friendship is becoming toxic? Here are 8 warning signs you need to watch out for that your best friend is becoming toxic for you.